1 | /* Bug 14333: Support file for atexit/exit, etc. race tests. |
2 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | /* This file must be run from within a directory called "stdlib". */ |
20 | |
21 | /* The atexit/exit, at_quick_exit/quick_exit, __cxa_atexit/exit, etc. |
22 | exhibited data race while accessing destructor function list (Bug 14333). |
23 | |
24 | This test spawns large number of threads, which all race to register |
25 | large number of destructors. |
26 | |
27 | Before the fix, running this test resulted in a SIGSEGV. |
28 | After the fix, we expect clean process termination. */ |
29 | |
30 | #if !defined(CALL_EXIT) || !defined(CALL_ATEXIT) |
31 | #error Must define CALL_EXIT and CALL_ATEXIT before using this file. |
32 | #endif |
33 | |
34 | #include <stdio.h> |
35 | #include <stdlib.h> |
36 | #include <support/xthread.h> |
37 | #include <limits.h> |
38 | |
39 | const size_t kNumThreads = 1024; |
40 | const size_t kNumHandlers = 1024; |
41 | |
42 | static void * |
43 | threadfunc (void *unused) |
44 | { |
45 | size_t i; |
46 | for (i = 0; i < kNumHandlers; ++i) { |
47 | CALL_ATEXIT; |
48 | } |
49 | return NULL; |
50 | } |
51 | |
52 | static int |
53 | do_test (void) |
54 | { |
55 | size_t i; |
56 | pthread_attr_t attr; |
57 | |
58 | xpthread_attr_init (attr: &attr); |
59 | xpthread_attr_setdetachstate (attr: &attr, detachstate: 1); |
60 | |
61 | /* With default 8MiB Linux stack size, creating 1024 threads can cause |
62 | VM exhausiton on 32-bit machines. Reduce stack size of each thread to |
63 | 128KiB for a maximum required VM size of 128MiB. */ |
64 | size_t kStacksize = |
65 | #ifdef PTHREAD_STACK_MIN |
66 | 0x20000 < PTHREAD_STACK_MIN ? PTHREAD_STACK_MIN : |
67 | #endif |
68 | 0x20000; |
69 | |
70 | xpthread_attr_setstacksize (attr: &attr, stacksize: kStacksize); |
71 | |
72 | for (i = 0; i < kNumThreads; ++i) { |
73 | xpthread_create (attr: &attr, thread_func: threadfunc, NULL); |
74 | } |
75 | xpthread_attr_destroy (attr: &attr); |
76 | |
77 | CALL_EXIT; |
78 | } |
79 | |
80 | #define TEST_FUNCTION do_test |
81 | #include <support/test-driver.c> |
82 | |